Measurements:
°C
°F
CURRENT WEATHER
15:09
Key West
90°F
W 11 mph
Feels like: 100°F
Precip: 27%
World Resorts USA Key West Weather

7 Day Weather Forecast

08.05
wed
DAY
92°F
W 12 mph
precip
5%
NIGHT
82°F
W 17 mph
precip
76%
08.06
thu
DAY
90°F
W 17 mph
precip
22%
NIGHT
90°F
W 19 mph
precip
15%
08.07
fri
DAY
90°F
W 16 mph
precip
36%
NIGHT
90°F
W 16 mph
precip
8%
08.08
sat
DAY
90°F
NW 17 mph
precip
12%
NIGHT
90°F
W 18 mph
precip
11%
08.09
sun
DAY
88°F
W 16 mph
precip
14%
NIGHT
90°F
W 18 mph
precip
9%
08.10
mon
DAY
90°F
NW 16 mph
precip
15%
NIGHT
90°F
W 20 mph
precip
9%
08.11
tue
DAY
90°F
W 16 mph
precip
13%
NIGHT
90°F
W 16 mph
precip
6%

Key West Sea Water Temperature in August, °F

Select Year: 2025 2024 2023

The average sea surface temperature in August 2025 for Key West was 31.5°F. The maximum and minimum values were 30.5°F and 32.6°F respectively.

Key West on the Weather Map

Best Time to Visit Key West
The most sunny months:
May 17 days
March 16 days
April 16 days
The most warm months:
August 91.6 °F
July 91.0 °F
September 89.7 °F
Warmest sea temperature:
August 91.3 °F
July 90.8 °F
September 90.1 °F
The most cold months:
January 74.4 °F
February 76.3 °F
December 78.2 °F
The most rainy months:
June 7 days
August 7 days
September 6 days
The most windy months:
November 14 mph
December 14 mph
January 14 mph
more details